//go:build ignore
// +build ignore

/*
Copyright 2021 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package main

import (
	"flag"
	"html/template"
	"os"
	"time"

	"k8s.io/klog/v2"

	"k8s.io/autoscaler/cluster-autoscaler/cloudprovider/aws"
	awssdk "k8s.io/autoscaler/cluster-autoscaler/cloudprovider/aws/aws-sdk-go/aws"
	"k8s.io/autoscaler/cluster-autoscaler/cloudprovider/aws/aws-sdk-go/aws/session"
)

var packageTemplate = template.Must(template.New("").Parse(`/*
Copyright The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

// This file was generated by go generate; DO NOT EDIT

package aws

// InstanceType is spec of EC2 instance
type InstanceType struct {
	InstanceType string
	VCPU         int64
	MemoryMb     int64
	GPU          int64
	Architecture string
}

// StaticListLastUpdateTime is a string declaring the last time the static list was updated.
var StaticListLastUpdateTime = "{{ .LastUpdateTime }}"

// InstanceTypes is a map of ec2 resources
var InstanceTypes = map[string]*InstanceType{
{{- range .InstanceTypes }}
	"{{ .InstanceType }}": {
		InstanceType: "{{ .InstanceType }}",
		VCPU:         {{ .VCPU }},
		MemoryMb:     {{ .MemoryMb }},
		GPU:          {{ .GPU }},
		Architecture: "{{ .Architecture }}",
	},
{{- end }}
}
`))

// Please note that the IAM user running the static instance types generator must be
// a non-anonymous user with privileges to call the DescribeInstanceTypes EC2 API.
func main() {
	var region = flag.String("region", "", "aws region you'd like to generate instances from.")
	flag.Parse()
	if awssdk.StringValue(region) == "" {
		klog.Fatalf("Region is required to generate instance types")
	}

	defer klog.Flush()

	sess, err := session.NewSession(&awssdk.Config{
		Region: region,
	})
	if err != nil {
		klog.Fatal(err)
	}

	instanceTypes, err := aws.GenerateEC2InstanceTypes(sess)
	if err != nil {
		klog.Fatal(err)
	}
	lastUpdateTime := time.Now().Format("2006-01-02")

	f, err := os.Create("ec2_instance_types.go")
	if err != nil {
		klog.Fatal(err)
	}

	defer f.Close()

	err = packageTemplate.Execute(f, struct {
		InstanceTypes  map[string]*aws.InstanceType
		LastUpdateTime string
	}{
		InstanceTypes:  instanceTypes,
		LastUpdateTime: lastUpdateTime,
	})

	if err != nil {
		klog.Fatal(err)
	}
}
